Gas-stove and fireless cooker



A. F. GLASS.

GAS STOVE AND FIRELESS COOKER.

APPLICATION HLED JUNE'H. 1919.

Patented Nov. 15, 1921.

2 SHEETSSHEET I- 7 Arnold). Glass.

A. F. GLASS.

GAS STOVE AND FIRELESS COOKER.

APPLICATION FILED JUNE 17, 19:9.

1 ,3 9'7, 207 Patented Nov. 15, 1921.

2 SHEETS-SHEET 2.

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ABHGLID F. GLASS, 01 BIRMINGHAM, ALABAIWIL GAS-STOVE AND FIBELESSCOOKER.

Application filed June 17, 1919. Serial No. 304,934. I

' siding at Birmingham, in the county of Jetferson and State of Alabama,have invented certain new and useful Improvements in GasStoves andFirelessCookers, of which the following is a specification.

This invention relates to improvements in gas burning stoves.

I have conceived that there is a present need for the development of agas burning stove which will have many advantages peculiar to a coal orwood burning range and to a fireless cooker, as well as having cer tainimportant advantages which are peculiar to a gas or oil burning stove.

The objects of my invention are attained by the construction andarrangements of parts which in their preferred embodiment only areillustrated in the accompanying drawings which form a part of thisspecilication and in which Figure 1 is a vertical sectional view throughmy improved stove taken on the line 11 of Fig. v

Fig. 2 is a horizontal sectional view taken on the line 22 of Fig. 1.

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is a detail view of the indicator on the main damper valve. 1

Fig. 5 is a detail sectional view showing one of the main burnersassociated with the adjacent broiling pan and slide damper tor theadjacent lower oven,

Fig. 6 is a detail view of the main damper valve broken away to show oneof the plates to prevent leakage past the damper ends.

Similar reference numerals refer to similar parts throughout thedrawings.

As illustrated, the stove comprises a metallic body supported at itscorners on legs 1 and provided with the end walls 2 and 3 and the backwall 4. The bottom wall 5 of the stove supports a front wall 6 havinglower oven ddors 7 and an upper oven door 9 suitably hinged thereto andadapted to close openings to compartments within the stove. The stove isprovided above its main burner chamber with a pair of straight barrelburners 10, each having longitudinal rows of pertorations 11 (see Fig.5), extending lengthwise on each side along its under portion. Theseburners project through the front wall of the stove and stop short ofthe back wall, leaving room at the rear for the coils o1 water heatingpipe 12 which enters through the back wall l oi? the stove, passeshorizontally to the end wall 2 and thence forwardly along said end wallto the front wall lift-hence return-ingin similar coils back and. forthand leaving through the rear wall. A tro'ugh or tank 13 for catching andholding the water of condensationdripping from the pipe coil 12 isangular in shape so as to underlie the coil and is formed betweenportions of the adjacent end andloack walls and a vertical partitionwall 1 1 which ex tends from the front wall to a point near the backwall, then parallel with said back wall to its point of junction withthe oven wall 15, which is parallel with the wall 14 and extends fromfront to back walls. A screw plug loxis provided in the bottom of thetank 13 for, draining it. The walls 14 and 15 have angle iron supports17 for a broiling pan 18 which underlies the burners 10.

wall 3 and to the front and back walls 6 and l so as to form an oveninclosing jacket. A suitable warming shelf 2 1 is connected to the backwall 4 to side wall 21 and to a vertical extension 28 of the end wall 2.

The oven wall 15 stops at a level substantially below the top 19 and isthere connected to a horizontal partition 29 which extends to the endwall 8 and defines a lower browning oven 30 and a warming oven 31 whichare separated by a vertical partition 32 and provided with theirrespective doors 7. This horizontal wall 29 extends from front to backof the stove and leaves sufiicient space betw'eenit and the top 19 forplacing ordi nary gas burners 33 below the eyes in the top 19 adjacentto the wall 21. The burners 10 and.33 project through the front wall 6and are supplied with gas from the gas main 34 by individual valves 35.

The main oven 36 of the stove is disposed above the wall 29 and .isspaced fromthe walls 21, 22 and 3. The oven has side walls 37 and 38,each formed by spaced metal sheets with a refractory body 39 interposedbetween them and the same refractory body is used between the sheetsforming the top 410 of the oven and also the front and back walls of theoven as indicated at 41, i2 in Fig. This lining of the oven walls is ofsuch character as to be highly eflicient in the retaining of heat so asto adapt the oven for use as a tireless cooker when the circulationports thereof are closed. The wall 38 of the oven is substantiallyspaced from the side wall 3 and a vertical partition wall 43 is providedextending from front to back of the stove and from the partitionQ-Q tothe level of the top 40 of the oven to which it is connected overhead,thus forming a double chamber for the full length of the right hand sideofthe oven. At the left hand side a vertical partition 44-. extends fromthe front to back and is connected overhead 'to theoven top 40 and atits bottom stops sub stantially at the level of the stove top 19. Thispartition 45% is substantially equally spaced from the oven wallv'37 andfrom the wall 21 and is connected top and bottom with the wall 37 toform a double chamber between 37 and 21. A main damper 45, provided withanasbestos or heat resisting lining 4:6,extends from front to back ofthe stove with its axis 47 in line with the wall 37 of the oven. Thisdamper is controlled. by a handle l8 which projects through the front 6of the stove and has a pointer 49 which operates over a cast plate 50displaying on one side thereof the word Heating and on the other sidethereof the word Fire less. By this means the pointer movementresponsive to the position of the damper 45 will indicate the positionof the damper and show'whether the oven is being operated with-heat oras a fireless cooker. The damper 48 is provided at its inner end with aspring 51 which presses it to the front and holds it in any set positionand in order to prevent leakage past the end joints between the damperand the front and back walls of the stove, I mount angled, taperingsealing plates 52; against which the damper seats when in its closed ortireless position and which are connected to the adjacent front or backwalls in such manner as to prevent objectionable leakage past the endsof the damper; The damper in its raised position is adapted to close theflue 53 which is formed by the outer chamber between the walls 21 and idbut it is normally set in lowcred position to deflect from the oven 36the products of combustion from the gas burners and conduct the sameupwardly and over the oven and to the flue 23. When the damper is raisedto close this flue 53 the products of combustion are forced to passunder the damper 45 into the bottom of the oven 36 and thence upwardlythrough the racks therein and out through the sets of ports arrangedalong the top of the oven walls 37 and 33 These sets of ports arecontrolled by slide valves 56 and when the latter are open the productsof combustion enter the top of the inner chambers formed between thewalls 37 and a l, and 38 and 43; downwardly between these walls andescape through ports 57 and 58 arranged near the bottom of the walls 43and 44:, respectively, these ports being respectively controlled by theslide dampers 59 and 60. and when the latter are open the products ofcombustion on the one hand enter the bottom of the chamber between theside wall 3 and the partition 43 and on the other hand enter thelowerpart of the flue The products of combustion thereafter pass upwardlyalong the walls 3 and 21 and over the top of the oven, the baliie orpartition 61 being provided to cause the products flowing from the wallto pass forwardly in the direction of the arrows 52 before returning tothe fine 23. i v

In order to prevent the burners being smothered by thesimultaneous'closing of the dampers 4-5 and 56, I provide a reliefdamper 62, shown moreclearly in Fig. 3, which damper is mounted to slidein a guide frame 63 attached to the inside wall 37 and a. link or rod61'- selves to connect this damper to 2' clip 65 on the main damper Thearran gement is such, that when the main damper is raised to divert theproducts ofromhust-ion into the oven, the relief damper will moveupwardly into position to bring its port into register with the port 66and the oven wall and thus permit a sufficientdraft to preventsmothering the burners. In 3 the outer sheet of the wall 37 is brokenaway to show the damper guide frame in elevation.

To permit the flow of heat through the browning oven 30 I provide aseries of ports 67 along the top of the wall 15 and a slide damper 68controls these ports. In the top oven wall 29 near the opposite end fromports 67 I provide outlet ports 69 disposed just in advance in positionof the main damper d5. V

In operation, having lighted the main burners 10 if it is desired tobake in the lm er oven 30 the damper 68 is opened and part of theproducts of combustion pass therethrough and return to the flue abovethe oven through the ports 69 and then are di verted either through theflue 53 to the stack, or through the oven 36. This lower oven isespecially adapted for browning. When the main oven 36 is to be used forordinary cooking, the damper 45 is raised to its dotted position, Fig.1, thereby causing the products of combustion from all lighted burnersto either flow upwardly through the oven and escape in controlled volumethrough the ports 56, thence flowing downwardly each side of the ovenand back upwardly along the walls 3 and 21 and over the oven to the flue23, lVhen it is desired to use the oven 36 for tireless cooking thedamper 45 is lowered to its full line position, Fig. 1, the slidedampers 56, 59 and G0 are closed thus providing a double sealed chamberon each side to retain the heat :in the insulated oven. At the same timethe ordinary cooking can proceed on the stove as the products ofcombustion will pass off to the flue 23 through the passage 53. I

The warming oven 31 below the oven 36 serves to effectively insulate thebottom of the tireless cooker while the double air chambers as well asthe insulation about the sides, top and end walls of the oven 36 willeflectively resist the radiation of heat. v

This invention is notintended to be re stricted in scope to the specificembodiments shown, but contemplates such modifications as come withinthe spirit and scope of the claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a gas burning cooking stove, a flue for carrying ofl the productsof combustion, an oven, damper controlled means to divert the productsof combustion into the lower part of the'oven, and means to draw off theproducts of combustion from the top of the oven at each side, said meanscomprising vertical return fiues leading downwardly along each side ofthe oven and returning back upwardly above the oven, and said dampercontrolled means comprising a damper adapted in one position to shortcircuit the products of combustion through the outer return fine and inanother position to direct the products through the oven.

2. In a gas burning stove, burners, a top having lids, a main flueextending under the top for the products of combustion from saidburners, an oven into the bottom of which said flue opens, walls forminga chamber on each side of the oven, walls forming escape flues extendingupwardly along the outer walls of said chambers, damper controlled meansto cause a down circulation from the top of the oven through saidchambers into said escape flues, and a swinging damper disposed andadapted alternately to open said oven and said escape flue to said mainflue.

3. In a gas burning stove, burners, a top having lids, a main fluepassing under the top for the products of combustion from said burners,an oven into the lower part of which said flue is adapted to dischargesaid products of combustion, chambers on each side of the oven closedexcept for top ports opening into the top of the oven and bottom otherposition to direct all the products I through one of saidescape flues.

l. In a gas burning stove, burners, a top having lids, a main fluepassing under the top for the products of combustion from said burners,an oven into the lower part of which said flue is adapted to dischargesaid products of combustion, chambers on each side of the oven closedexcept for top ports opening into the top of the oven and bottom portsopening into escape flues, escape flues which are substantiallyco-extensive with the oven sides and with said chambers, damper means toregulate the flow. of products through said oven and chambers, thedamper means which in one position admits the products to the oven beingadapted in its other position to direct all the products through one ofsaid escape flues, and a safety damper movable to open position by saidlatter damper means, when closing said escape flue, to preserve asuflicient circulation of products through the oven chamber and escapeflue to avoid smothering the burners.

5. In a gas burning stove, an oven having a bottom inlet for theproducts of combustion, oven sides having top outlet ports;

walls forming with each side of the oven a chamber having bottom outletports, walls forming with said first mentioned walls and the oven topflues which lead to a stack, damper means to regulate the flow ofproducts of combustion from the oven through said chambers to saidflues, and a damper means to direct the products either through saidoven and chambers to said flues ordirectly to the flues.

6. In a gas burning stove, an oven having a bottom side inlet for theproducts of combustion, oven sides having top outlet ports, wallsforming with each side of the oven a chamber having bottom outlet ports,the chamber on the oven side having the inlet terminating at said inlet,walls forming.

with said first mentioned walls and the oven top fines which lead to astack, damper means to regulate the flow of products of combustion fromthe oven through said chambers to said flues, and a damper means locatedin said inlet and adapted to direct the products either through saidoven and chambers to said lines or directly into the adjacent of saidflues.

7. In a gas stove, a main oven having its walls insulated, and dampermeans to control the flow of products of combustion through the oven,the oven having on each side a double chamber, the sections of whichcommunicate near the bottom of the oven, and through which double.chambers the products of combustion escaping from the oven are caused toflow downwardly and then back upwardly and over the oven top beforeescaping, and through the outer of which chambers the products ofcombustion flow, when such products are diverted by said damper meansfrom passage through the oven.

8. In a gas burning cooking oven, burners, a baking oven, a flue fordirectingthe proclucts of combustion from the burners to the oven, amain damper to control the admission of said products of combustion tothe oven, an outlet flue adapted to be closed by said damper when it isset to admit products of combustion in to the oven, there being dampercontrolled ports for the escape of products of combustionfrom said oveninto said flue, and means controlled by said main damper to permit theescape of suffici nt products of combustion from said oven to avoidsmothering the burner.

In testimony whereof I afliX my signature.

I ARNOLD F. GLASS. lVitness: V

NoMIE WVELsH.

